Clojure used to have something called, clojure contrib and it was kind of awsome, it did pretty much everything in just one jar. It was also a huge problem to mentain and everybody wanted to be in contrib, so you had the one json lib in contrib and fasters outside.

With clojure 1.3 it got split up into many diffrent parts and it still servs as somewhat of a community standard or recommended library. Overall its much better and much more usful, but sometimes I miss the days when everything was in one jar on on dependency.